Work is under way to establish the first global Islamic historical encyclopaedia of its kind on the Haj, Makkah, the Grand Mosque and the Prophet’s Mosque in Madinah. Involved in the preparation of the encyclopaedia are Custodian of the Two Holy Mosques Institute for Haj Research and King Abdul Aziz Foundation for Research and Archive (Al-Darah).
The second track of the encyclopaedia is to build a database of Haj, which includes the works and manuscripts, travel and literature of pilgrimage in Islamic countries traditional and modern in all languages, various statistics and research data.